To provide a more accurate response, I need to know which specific explorers or archaeological remains you are referring to. Explorers and archaeologists often use a combination of historical research, scientific methods, and cultural context to explain remains they discover. They may analyze artifacts, examine burial practices, and consider the geological context of the site. Additionally, they might compare their findings with known historical records or similar discoveries in other locations.
Please provide more specific details about the explorers or remains in question, and I'll be happy to help!